Siphon gas-generator.



No. 854,681. PATENTED MAY 21, 1907. S. P. AARON & S.- H. HAMILTON.

SIPHON GAS GENERATOR. APPLIGATION FILED MAY 19. 1906. RENEWED MAR. 23,1907.

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UNITED STATES PATENT orrion SAMUEL FRANK AARON AND SAMUEL HARBERT HAMILTON, OF PHILADEL PHIA, PENNSYLVANIA; SAID AARON ASSIGNOR TO THE SCIENTIFIC PRESERVATION COMPANY, OF PHILADELPHIA, PENNSYLVANIA, ACOR- PORATION OF WEST VIRGINIA.

SIPHON GAS-GENERATOR.

Specification of Letters Patent.

Z-atentec'i May 21, 1907.

Application filed May 19, 1906. Renewed March 23, 1907. Serial No. 364,065.

To aZZ whom it may concern: I 7

Be it known that we, SAMUEL FRANK AARON and SAMUEL HARBERT HAMILTON, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Siphon Gas-Generators; and we do hereby declare the following to be a full, clear, and 10 exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The purpose of our invention is the production of a device for the generation of a highly poisonous gas which must be delivered at a distance from the operator and in the claim appended hereto We will point out the'features of the device which constitute our improvement.

The accompanying drawing shows in Figure 1 a vertical section of a tank gas generator embodying our invention and Fig. 2 is a top view of the same. Fig. 3 shows the siphon contained in the tank chambers and having its controlling cock projecting through the wall of the lower-chamber.

A metal tank 1, of suitable dimensions is divided into an upper chamber 2, for containing a chemical liquid and a lower chamber 3,

0 for containing a chemical and between these chambers communication with each other is made by means of a siphon. The short leg 4, of the siphon opens into the upper liquid containing chamber, and preferably passes through the top thereof and returning at its bend through the top its long leg 5, pierces the bottom 6, of said chamber and opens into the lower chemical containing chamber.

The bend of the siphon is outside of the 4 chamber top to receive a plug-cock 7, by which to' close the communication between the chambers when it is not desired to operate the device and to regulate the quantity of the feed through the siphon. The top of the tank is provided with a necked opening 8, closed by a suitable stopper 9, having two openings one of which contains a metal tube 10, which opens into the upper chamber and with which a hose 11, is connected the pur- 5 pose of which is to start the siphon by air pressure within the chamber and this pressure may be supplied by a small hand pump. This forced air pressure need only be for a moment and by acting on the surface of the liquid causes it to be forced up into and through the siphon into the lower chamber and during which the plug-cock is open. Provision is made by a second opening 12, in the stopper for a normal air pressure in the chamber for causing a continued flow of the liquid through the siphon but this opening must be closed during the forced air pressure in the chamber and for this purpose a valve 13, controls the inner end of this supplemental opening, being closed by the pressure of the air in the chamber and caused to open by gravity when such pressure ceases and the normal pressure rendered active through said valved opening.

The feeding of the chemical liquid by the siphon into the lower chamber containing a chemical, which may be a liquid or a solid, by their simple union effects the generation of the gas in the lower chamber from which this gas passes through a tube 14, passing through the liquid chamber at the wall of the tank and opening at the top thereof and from which a tube 15, may lead for the delivery of the gas for the desired purpose and at the de sired place as into the air in a fumigating chest or closure. The plug -cock in the siphon is for safety and the extension of the bend of the siphon above the top of the tank renders it convenient to apply and to control the safety-cock.

Any suitable chemicals may be used that will produce a gas of a poisonous character and it may be used for well known purposes.

A valve 16, controls the delivery tube, and a plug valve 17 controls the starting tube 10, so that the chambers may be practically closed when the generator is not in use; while the provision for controlling the siphon feedcauses the generation of the gas to be stopped.

Obviously the starting blow-pipe of the stopper may be used without the connected hose; and the safety cock may be inclosed by a locked cover.

Obviously the siphon need not extend through the top of the tank, but the controlling cock of the siphon may projectthrough the wall of the lower chamber as in Fig. 3.

The liquid chemical in the chamber 3, may be supplied by removing the outflow pipe 15, at its joint connection and the upper chamber is supplied with a chemical by removing the stopper. the stopper serves several purposes. First to allow access to the upper chamber for supplying it with the chemical: Second, the means for containing a valve controlled blow tube for starting the siphon. Third, the means for continuing the operation of the siphon by normal air pressure through a valve controlled opening and so far as we know and can find this is a new construction in which a siphon fed gas generator, is started and con tinued by air pressure in the upper chamber rendered active in separate and independent action in the upper chamber.

We have stated that any suitable chemicals may be used and while we do not wish to be confined to any particular character of gas or to any particular chemicals because they may be varied according to conditions, yet as to the character of the gas it may be carbonic acid, hydrocyanic acid, hydrochloric acid or a mixture of these gases; or the gases may be bromin, chlorin, or some related poisonous gas which it would be dangerous to inhale.

To give an example of the chemical liquid and the chemical employed and supposing that it is required to fumigate for disease and stench, the upper chamber would be filled with some dilute acid liquor, for example hydrochloric, and the lower chamber would be filled with some chemical that would evolve,say chlorin (as chlorinated lime) when the acid liquid came in contact with the gas producing chemical. In this operation the liquid chemical from the upper chamber when united with the chemical liquid in the lower chamber forms a chemical combination and gives off or generates a poisonous gas which is death to animal, insect, or germ life, and is caused to pass freely and without pressure from said chamber into a closure which, obviously must be air tight and into which the outlet pipe opens and which is always open so that the gas does not collect under pressure in the generating chamber, but passes freely therefrom into the fumigating chamber, the valve being provided in the delivery pipe to close it when desired.

It is important to note that I I 1 I We claim: I

1. A gas generator comprising a tank divided into an upper and lower chamber, a siphon having its short leg opening into the upper chamber, passing through the top of the tank, returning in a bend through the same, through the upper chamber, through the bottom thereof and terminating in the lower chamber, a safety-cock in the external bend of the siphon for closing it, a stopper in the top of the tank having a tube for introducing air under pressure into said upper chamber for starting the siphon, a second opening in said stopper controlled by a valve opening in said chamber, and a delivery pipe for the gas from the lower chamber, whereby a forced and a normal air pressure is rendered active in separate and independent action in the upper chamber for the purpose stated.

2. A gas generator comprising a tank di vided into an upper and a lower chamber, a siphon having its short leg opening into the upper chamber, passing through the top thereof and its long leg passing through the bottom thereof and terminating in the lower chamber, a safety-cock for closing the siphon, a stopper in the top of the tank having a plurality of openings, a tube in one of the openings for supplying air under pressure into the top chamber for starting the siphon, a second opening in said stopper controlled by a valve opening in said chamber, and a delivery pipe opening into a fumigating closure, whereby the gas is delivered from the generating chamber without pressure.

3. The combination in a gas generator, of a tank divided into an upper and a lower chamber, each for containing a chemical, a siphon connecting the chambers, and a stop per closing an opening in the top of the tank and having an outer valve controlled blow opening, said stopper also having an opening controlled by a valve opening within the up per chamber, whereby the siphon is started and continued by air pressure within the upper chamber, as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

SAMUEL FRANK AARON. SAMUEL HARBERT HAMILTON. Witnesses:

ALEXANDER R. BARRETT, FRANK R. BUCHANAN. 

